Portion of a key blade blank



FIG. 1 is a front elevational view of our new design of a portion of a key blade blank;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental deisng for a portion of a key blade blank, as shown and described. 